import React, { Component } from 'react'
import { NavLink,  Route, Switch, Redirect} from 'react-router-dom'
import Home from './pages/Home'  // Home是路由组件
import About from './pages/About'   // About 是路由组件
import Header from './components/Header'   // Header是一般组件


export default class App extends Component {

  render() {
    return (
      <div>
        <div className="row">
          <div className="col-xs-offset-2 col-xs-8">
            <Header/>
          </div>
        </div>
        <div className="row">
          <div className="col-xs-2 col-xs-offset-2">
            <div className="list-group">

              {/* 在React中靠路由链接实现切换组件 */}
              <NavLink activeClassName='atguigu' className='list-group-item' to="/about">About</NavLink>
              <NavLink activeClassName='atguigu' className='list-group-item' to="/home">Home</NavLink>
            </div>
          </div>
          <div className="col-xs-6">
            <div className="panel">
              <div className="panel-body">
                {/* 注册路由 */}
                <Switch>
                  <Route path= '/about' component={About}></Route>
                  <Route path= '/home' component={Home}></Route>
                  <Redirect to='/about' />
                </Switch>
              </div>
            </div>
          </div>
        </div>
      </div>
    )
  }
}
